H - Electricity – 01 – C
Patent
H - Electricity
01
C
338/10, 324/21
H01C 1/142 (2006.01) G01D 5/165 (2006.01) G01R 31/02 (2006.01) H01C 10/36 (2006.01) H01C 10/38 (2006.01) H01H 3/02 (2006.01)
Patent
CA 2022310
ABSTRACT OF THE DISCLOSURE VARIABLE IMPEDANCE DEVICE AND CIRCUIT FOR SENSING ADJUSTMENT THEREOF A circuit and apparatus for sensing the adjustment of a variable impedance device includes an elongated switching element having an alternating series of conductive and non- conductive areas. The conductive areas are electrically connected. As the device is adjusted, a wiper alternately operates the switch between open and closed states. A circuit detects the switch-state change and provides a signal which indicates that the device is being adjusted. The signal can, in turn, determine the output of a dimming circuit, a wireless transmitter, etc., or can determine whether power is provided to a microprocessor or the like. In another embodiment of the invention, a variable impedance device includes an end-of-travel return mechanism.
Barney Jonathan A.
Karunaratne Arjuna
Moseley Robin C.
Barney Jonathan A.
Gowling Lafleur Henderson Llp
Karunaratne Arjuna
Lutron Electronics Co. Inc.
Moseley Robin C.
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